The designer has moved past his ‘Project Runway’ fame and emerged as a legitimate force in fashion by designing for real women in the spotlight

Elizabeth Holmes

When actress Leslie Jones couldn’t find a dress for the premiere of “Ghostbusters” this summer, she turned to Twitter. “It’s so funny how there are no designers wanting to help me,” Ms. Jones wrote.

Christian Siriano, the 30-year-old designer who came onto the scene nearly a decade ago as a winner on reality TV’s “Project Runway,” jumped at the opportunity. He replied with a pair of emoji, an open hand and a waving one. “YAAAAAASSSSSS,” Ms. Jones wrote back.